| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply voltage controller that controls a power supply voltage of a power amplifier depending on the transmission power so as to enhance the efficiency of the power amplifier and controls the consumption of a storage battery so as to efficiently use the storage battery. SOLUTION: A RAM 50 stores a power supply voltage table where the output power of the power amplifier is cross-reference with the power supply voltage of the power amplifier. When a control section 30 acquires information of the output power Pout, the control section 30 acquires the power supply voltage corresponding to the output power from the power supply voltage table and controls a DC/DC converter 40 so that the power supply voltage is equal to the power supply voltage acquired from an output voltage of the DC/DC converter 40. The DC/DC converter 40 is operated on the basis of the signal received from the control section 30 to step down the power received from a battery 60 into a voltage at which the power amplifier 20 efficiently operates and applies this stepped down voltage to the power amplifier as its power supply voltage. |
